Hex Head Bolt Full Thread (DIN 933 / ISO 4017) – Grade 4.8 / 8.8 / 10.9 – Manufacturer Direct

Premium Hex Head Bolts (Full Thread): DIN 933 & ISO 4017 Standards

At Handan Bolt, we are a specialized manufacturer of high-precision Full Thread Hex Bolts, also technically referred to in the industry as Hexagon Head Screws. Manufactured in our massive facility in Yongnian, China, these fasteners are the backbone of the construction and machinery industries. Unlike partial thread bolts (DIN 931), our fully threaded bolts offer engagement along the entire length of the shank, providing maximum grip strength and versatility for various assembly depths.

What is a Full Thread Hex Bolt?

A Hex Bolt (Read more on Wikipedia) is a fastener with a six-sided head designed to be driven by a wrench or socket. The “Full Thread” designation (specifically DIN 933 or ISO 4017) means the threading extends all the way from the tip of the bolt up to underneath the head. This design is crucial when:

• The bolt needs to be inserted into a threaded hole (tapped hole) without a nut.
• Adjustability is required (e.g., using nuts to position an object along the bolt’s length).
• Maximum clamping force is needed across thin plates.

International Standards Compliance

Your project safety depends on adherence to standards. We strictly manufacture to the following norms mentioned in your specifications:

1. DIN 933 / ISO 4017 (Coarse Thread)

This is the global standard for fully threaded hex bolts with coarse metric threads. It is our most produced item, available in sizes M3 through M64.

2. DIN 961 / ISO 8676 (Fine Thread)

For precision applications where vibration is a concern, we manufacture DIN 961 bolts. These feature a finer thread pitch (e.g., M10x1.0 instead of standard M10x1.5), offering better self-locking properties and higher tensile strength.

3. DIN 558 (Machining Screws)

For cost-sensitive projects requiring lower strength (Grade 4.8), we offer DIN 558 fully threaded screws, ideal for light-duty fastening.

Material Grades and Strength

We supply bolts in a wide range of property classes to match your load-bearing requirements:

• Grade 4.8 (Low Carbon Steel): The economical choice. Used for non-structural applications like securing fences, light brackets, and furniture.
• Grade 8.8 (Medium Carbon Steel – Quenched & Tempered): High-tensile structural bolts. These are the industry standard for steel frame construction, automotive assembly, and heavy machinery.
• Grade 10.9 & 12.9 (Alloy Steel): For critical high-stress applications requiring exceptional yield strength.

Surface Treatment Options

To ensure longevity in any environment, we offer premium coatings:

• Zinc Plated (Blue/White/Yellow): Provides a sacrificial layer of protection against rust. Our Cr3+ plating is environmentally friendly and aesthetically pleasing.
• Hot Dip Galvanized (HDG): Essential for outdoor construction. We apply a thick zinc coating (typically 40-80 microns) that withstands decades of weather exposure.
• Black Oxide / Black Zinc: Offers mild corrosion resistance and a sleek black appearance, often preferred in automotive undercarriages or architectural designs.
• Plain (Oiled): For bolts that will be welded or painted on-site.

Why Partner with Handan Bolt?

Massive Inventory: We stock tons of standard DIN 933 sizes (M6-M24) ready for immediate shipment.
OEM Capability: We can mark your company logo on the bolt head (for orders meeting MOQ) to enhance your brand visibility.
Rigorous Testing: Our in-house lab performs tensile testing, hardness testing, and thread Go/No-Go gauge inspections on every batch.

Get a Direct Factory Quote

Stop overpaying trading companies. Source your high-tensile fasteners directly from Yongnian’s leading manufacturer.

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